Positive word of mouth and brand advocacy are important to any organization. But for nonprofits, groups that are typically challenged by strict budgets, limited human resources and government regulations, word-of-mouth and advocacy marketing are key strategies. Enter social media and the abundance of wide-open channels (most of them free to use) and communities of socially and ethically conscious millions. For many nonprofits, the opportunity to identify and tap into groups of like-minded citizens helps the organization not only share its mission and mandate, but use the common collective of fans and followers to spread those messages far and wide. Let’s look at ten nonprofits doing just that.